25 |
|
static RTREE **twigbundle; /* free twig blocks (NULL term.) */ |
26 |
|
static int nexttwig; /* next free twig */ |
27 |
|
|
28 |
– |
#define is_stump(t) (!((t)->flgs & (BR_ANY|LF_ANY))) |
28 |
|
|
30 |
– |
|
29 |
|
static RTREE * |
30 |
|
newtwig() /* allocate a twig */ |
31 |
|
{ |
294 |
|
} |
295 |
|
|
296 |
|
|
297 |
< |
dev_value(c, p) /* add a pixel value to our output queue */ |
297 |
> |
dev_value(c, p) /* add a pixel value to our quadtree */ |
298 |
|
COLR c; |
299 |
|
FVECT p; |
300 |
|
{ |
359 |
|
qtL.chr+borg, blen); |
360 |
|
qtL.tml = qtL.tl; |
361 |
|
return(1); |
364 |
– |
} |
365 |
– |
|
366 |
– |
|
367 |
– |
static |
368 |
– |
redraw(tp, x0, y0, x1, y1, l) /* mark portion of a tree for redraw */ |
369 |
– |
register RTREE *tp; |
370 |
– |
int x0, y0, x1, y1; |
371 |
– |
int l[2][2]; |
372 |
– |
{ |
373 |
– |
int quads = CH_ANY; |
374 |
– |
int mx, my; |
375 |
– |
register int i; |
376 |
– |
/* compute midpoint */ |
377 |
– |
mx = (x0 + x1) >> 1; |
378 |
– |
my = (y0 + y1) >> 1; |
379 |
– |
/* see what to do */ |
380 |
– |
if (l[0][0] >= mx) |
381 |
– |
quads &= ~(CHF(2)|CHF(0)); |
382 |
– |
else if (l[0][1] < mx) |
383 |
– |
quads &= ~(CHF(3)|CHF(1)); |
384 |
– |
if (l[1][0] >= my) |
385 |
– |
quads &= ~(CHF(1)|CHF(0)); |
386 |
– |
else if (l[1][1] < my) |
387 |
– |
quads &= ~(CHF(3)|CHF(2)); |
388 |
– |
tp->flgs |= quads; /* mark quadrants for update */ |
389 |
– |
/* climb the branches */ |
390 |
– |
for (i = 0; i < 4; i++) |
391 |
– |
if (tp->flgs & BRF(i) && quads & CHF(i)) |
392 |
– |
redraw(tp->k[i].b, i&01 ? mx : x0, i&02 ? my : y0, |
393 |
– |
i&01 ? x1 : mx, i&02 ? y1 : my, l); |
394 |
– |
} |
395 |
– |
|
396 |
– |
|
397 |
– |
static |
398 |
– |
update(ca, tp, x0, y0, x1, y1) /* update tree display as needed */ |
399 |
– |
BYTE ca[3]; /* returned average color */ |
400 |
– |
register RTREE *tp; |
401 |
– |
int x0, y0, x1, y1; |
402 |
– |
{ |
403 |
– |
int csm[3], nc; |
404 |
– |
register BYTE *cp; |
405 |
– |
BYTE rgb[3]; |
406 |
– |
int gaps = 0; |
407 |
– |
int mx, my; |
408 |
– |
register int i; |
409 |
– |
/* compute midpoint */ |
410 |
– |
mx = (x0 + x1) >> 1; |
411 |
– |
my = (y0 + y1) >> 1; |
412 |
– |
csm[0] = csm[1] = csm[2] = nc = 0; |
413 |
– |
/* do leaves first */ |
414 |
– |
for (i = 0; i < 4; i++) { |
415 |
– |
if (tp->flgs & LFF(i)) { |
416 |
– |
cp = qtL.rgb[tp->k[i].li]; |
417 |
– |
csm[0] += cp[0]; csm[1] += cp[1]; csm[2] += cp[2]; |
418 |
– |
nc++; |
419 |
– |
if (tp->flgs & CHF(i)) |
420 |
– |
dev_paintr(cp, i&01 ? mx : x0, i&02 ? my : y0, |
421 |
– |
i&01 ? x1 : mx, i&02 ? y1 : my); |
422 |
– |
} else if ((tp->flgs & CHBRF(i)) == CHF(i)) |
423 |
– |
gaps |= 1<<i; /* empty stem */ |
424 |
– |
} |
425 |
– |
/* now do branches */ |
426 |
– |
for (i = 0; i < 4; i++) |
427 |
– |
if ((tp->flgs & CHBRF(i)) == CHBRF(i)) { |
428 |
– |
update(rgb, tp->k[i].b, i&01 ? mx : x0, i&02 ? my : y0, |
429 |
– |
i&01 ? x1 : mx, i&02 ? y1 : my); |
430 |
– |
csm[0] += rgb[0]; csm[1] += rgb[1]; csm[2] += rgb[2]; |
431 |
– |
nc++; |
432 |
– |
} |
433 |
– |
if (nc > 1) { |
434 |
– |
ca[0] = csm[0]/nc; ca[1] = csm[1]/nc; ca[2] = csm[2]/nc; |
435 |
– |
} else { |
436 |
– |
ca[0] = csm[0]; ca[1] = csm[1]; ca[2] = csm[2]; |
437 |
– |
} |
438 |
– |
/* fill in gaps with average */ |
439 |
– |
for (i = 0; gaps && i < 4; gaps >>= 1, i++) |
440 |
– |
if (gaps & 01) |
441 |
– |
dev_paintr(ca, i&01 ? mx : x0, i&02 ? my : y0, |
442 |
– |
i&01 ? x1 : mx, i&02 ? y1 : my); |
443 |
– |
tp->flgs &= ~CH_ANY; /* all done */ |
444 |
– |
} |
445 |
– |
|
446 |
– |
|
447 |
– |
qtRedraw(x0, y0, x1, y1) /* redraw part or all of our screen */ |
448 |
– |
int x0, y0, x1, y1; |
449 |
– |
{ |
450 |
– |
int lim[2][2]; |
451 |
– |
|
452 |
– |
if (is_stump(&qtrunk)) |
453 |
– |
return; |
454 |
– |
if (!qtMapLeaves((lim[0][0]=x0) <= 0 & (lim[1][0]=y0) <= 0 & |
455 |
– |
(lim[0][1]=x1) >= odev.hres-1 & (lim[1][1]=y1) >= odev.vres-1)) |
456 |
– |
return; |
457 |
– |
redraw(&qtrunk, 0, 0, odev.hres, odev.vres, lim); |
458 |
– |
} |
459 |
– |
|
460 |
– |
|
461 |
– |
qtUpdate() /* update our tree display */ |
462 |
– |
{ |
463 |
– |
BYTE ca[3]; |
464 |
– |
|
465 |
– |
if (is_stump(&qtrunk)) |
466 |
– |
return; |
467 |
– |
if (!qtMapLeaves(0)) |
468 |
– |
return; |
469 |
– |
update(ca, &qtrunk, 0, 0, odev.hres, odev.vres); |
362 |
|
} |